0,0 → 1,134 |
/* |
* SoX native format demuxer |
* Copyright (c) 2009 Daniel Verkamp <daniel@drv.nu> |
* |
* Based on libSoX sox-fmt.c |
* Copyright (c) 2008 robs@users.sourceforge.net |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
/** |
* @file |
* SoX native format demuxer |
* @author Daniel Verkamp |
* @see http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format |
*/ |
|
#include "libavutil/intreadwrite.h" |
#include "libavutil/intfloat.h" |
#include "libavutil/dict.h" |
#include "avformat.h" |
#include "internal.h" |
#include "pcm.h" |
#include "sox.h" |
|
static int sox_probe(AVProbeData *p) |
{ |
if (AV_RL32(p->buf) == SOX_TAG || AV_RB32(p->buf) == SOX_TAG) |
return AVPROBE_SCORE_MAX; |
return 0; |
} |
|
static int sox_read_header(AVFormatContext *s) |
{ |
AVIOContext *pb = s->pb; |
unsigned header_size, comment_size; |
double sample_rate, sample_rate_frac; |
AVStream *st; |
|
st = avformat_new_stream(s, NULL); |
if (!st) |
return AVERROR(ENOMEM); |
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
|
if (avio_rl32(pb) == SOX_TAG) { |
st->codec->codec_id = AV_CODEC_ID_PCM_S32LE; |
header_size = avio_rl32(pb); |
avio_skip(pb, 8); /* sample count */ |
sample_rate = av_int2double(avio_rl64(pb)); |
st->codec->channels = avio_rl32(pb); |
comment_size = avio_rl32(pb); |
} else { |
st->codec->codec_id = AV_CODEC_ID_PCM_S32BE; |
header_size = avio_rb32(pb); |
avio_skip(pb, 8); /* sample count */ |
sample_rate = av_int2double(avio_rb64(pb)); |
st->codec->channels = avio_rb32(pb); |
comment_size = avio_rb32(pb); |
} |
|
if (comment_size > 0xFFFFFFFFU - SOX_FIXED_HDR - 4U) { |
av_log(s, AV_LOG_ERROR, "invalid comment size (%u)\n", comment_size); |
return AVERROR_INVALIDDATA; |
} |
|
if (sample_rate <= 0 || sample_rate > INT_MAX) { |
av_log(s, AV_LOG_ERROR, "invalid sample rate (%f)\n", sample_rate); |
return AVERROR_INVALIDDATA; |
} |
|
sample_rate_frac = sample_rate - floor(sample_rate); |
if (sample_rate_frac) |
av_log(s, AV_LOG_WARNING, |
"truncating fractional part of sample rate (%f)\n", |
sample_rate_frac); |
|
if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size |
|| st->codec->channels > 65535) /* Reserve top 16 bits */ { |
av_log(s, AV_LOG_ERROR, "invalid header\n"); |
return AVERROR_INVALIDDATA; |
} |
|
if (comment_size && comment_size < UINT_MAX) { |
char *comment = av_malloc(comment_size+1); |
if(!comment) |
return AVERROR(ENOMEM); |
if (avio_read(pb, comment, comment_size) != comment_size) { |
av_freep(&comment); |
return AVERROR(EIO); |
} |
comment[comment_size] = 0; |
|
av_dict_set(&s->metadata, "comment", comment, |
AV_DICT_DONT_STRDUP_VAL); |
} |
|
avio_skip(pb, header_size - SOX_FIXED_HDR - comment_size); |
|
st->codec->sample_rate = sample_rate; |
st->codec->bits_per_coded_sample = 32; |
st->codec->bit_rate = st->codec->sample_rate * |
st->codec->bits_per_coded_sample * |
st->codec->channels; |
st->codec->block_align = st->codec->bits_per_coded_sample * |
st->codec->channels / 8; |
|
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
|
return 0; |
} |
|
AVInputFormat ff_sox_demuxer = { |
.name = "sox", |
.long_name = NULL_IF_CONFIG_SMALL("SoX native"), |
.read_probe = sox_probe, |
.read_header = sox_read_header, |
.read_packet = ff_pcm_read_packet, |
.read_seek = ff_pcm_read_seek, |
}; |